The story holds our attention as suspense mounts. What has happened to the narrator? Foreshadowing gives us a clue that something extra-natural will occur:
in those studies began to develop my sense of vision by dreams.
It is good that you inform the reader early on that the narrator believes she is dead. Sometimes, writers leave the reader in such suspense in surreal situations that the result is frustration rather than anticipation. Here we are curious and even worried, but not frustrated.
In the end, you tie the pieces of the story together by concluding with a validation of the foreshadowing. The narrator had a vision, apparently, of the tragedy on the bridge.
Thank you for posting this interesting story in the Ink Well community.